Peace of Oliva

The Treaty or Peace of Oliva of 23 April (OS)/3 May (NS) 1660 (Polish: Pokój Oliwski, Swedish: Freden i Oliva, German: Vertrag von Oliva) was one of the peace treaties ending the Second Northern War (1655-1660). At Oliva (Oliwa, Royal Prussia), peace was made between Sweden, the Polish-Lithuanian Commonwealth, the Habsburgs and Brandenburg-Prussia.

Sweden was accepted as sovereign in Swedish Livonia, Brandenburg was accepted as sovereign in Ducal Prussia, and John II Casimir Vasa withdrew his claims to the Swedish throne, though he was to retain the title of a hereditary Swedish king for life. All occupied territories were restored to their pre-war sovereigns. Catholics in Livonia and Prussia were granted religious freedom.

The signatories were the Habsburg Holy Roman Emperor Leopold I, Elector Frederick William I of Brandenburg and King John II Casimir Vasa of Poland. Magnus Gabriel de la Gardie, head of the Swedish delegation and the minor regency, signed on behalf of his nephew, King Charles XI of Sweden, who was still a minor at the time.

...
Wikipedia